Clipboard clamp



FIG. 1 is a top, left front perspective view of a clipboard clamp showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a left side elevational view;

FIG. 4 is a right side elevational view;

FIG. 5 is a bottom plan view;

FIG. 6 is a rear elevational view;

FIG. 7 is a front elevational view; and,

FIG. 8 is a reduced top, left front perspective view, the clipboard and paper pad depicted by means of broken lines being shown for illustrative purposes only and forming no part of the claimed design. 

The ornamental design for an "clipboard clamp", as shown and described. 